Sony SCD-XB940 Service Manual ▷ View online
29
29
SCD-XB940
4-21. SCHEMATIC DIAGRAM – POWER Board –
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
(Page 27)
(Page 16)
(Page 23)
(Page 23)
(Page 31)
(Page 31)
30
30
SCD-XB940
4-22. PRINTED WIRING BOARDS – AC SW/TRANSFORMER Boards –
•
See page 11 for Circuit Boards Location.
TO
TRANSFORMER
BOARD
TO
AC SW
BOARD
(Page 28)
(Page 28)
31
31
SCD-XB940
4-23. SCHEMATIC DIAGRAM – AC SW/TRANSFORMER Boards –
The components identified by mark
0
or dotted
line with mark
0
are critical for safety.
Replace only with part number specified.
(Page 29)
(Page 29)
32
32
• Waveforms
– TK Board –
– TK Board –
1
IC001
el
(TE) (CD PLAY)
2
IC001
r;
(FE) (CD PLAY)
3
IC001
tf
(SIGO) (CD PLAY)
Approx.
100 mVp-p
100 mVp-p
Approx.
60 mVp-p
60 mVp-p
Approx.
1.4 Vp-p
1.4 Vp-p
2
IC607
yk
(ADC1) (CD PLAY)
3
IC607
yl
(ADC0) (CD PLAY)
– MAIN Board –
1
IC607
<z/,
(X2/CLKIN)
4
IC605
tf
(X0)
5
IC617
5
(SDCK)
3.5 Vp-p
27 MHz
Approx.
60 mVp-p
60 mVp-p
Approx.
100 mVp-p
100 mVp-p
3.5 Vp-p
12.5 MHz
4 Vp-p
296 ns
7
IC617
rh
(BCKA)
8
IC621
8
(X2Q)
6
IC617
rs
(BCKD)
9
IC621
qa
(2CK)
q;
IC623
1
2.1 Vp-p
88.5 ns
3.8 Vp-p
177 ns
3.7 Vp-p
354 ns
3.1 Vp-p
177 ns
3.4 Vp-p
354 ns
qa
IC617
qf
(MCKI)
IC622
<zxc
(SCKI), IC623
8
qs
IC622
ql
(RFIN2) (CD PLAY)
qd
IC622
oa
(SDCK)
2
IC301
rf
(LVCKO2),
IC309
1
(CLK)
3
IC301
rl
(BCKI)
– AUDIO Board –
1
IC301
qs
(XOUT)
4
IC301
t;
(LRCKI)
5
IC301
ta
(SBCKI)
6
IC309
5
(Q)
qf
IC622
<z/,
(BCLK)
qg
IC622
<z/.
(LRCK)
2.9 Vp-p
29.5 ns
Approx.
1.4 Vp-p
1.4 Vp-p
3.8 Vp-p
296 ns
3.4 Vp-p
354 ns
3.5 Vp-p
22.7
µ
s
1.7 Vp-p
45 MHz
3.2 Vp-p
88.5 ns
3.4 Vp-p
354 ns
3.5 Vp-p
22.7
µ
s
3.4 Vp-p
354 ns
4.4 Vp-p
177 ns
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